106. Tea Tree (Melaleuca alternifolia - Australia)

Tea Tree is the most medicinal of the essential oils, with powerful anti-microbial activity against all three of the infectious organisms: bacteria, viruses and fungi. When diffused in an oil burner, tea tree is particularly helpful in preventing the spread of air-borne infections. Together with its powerful immuno-stimulant properties, it is a real ally in combating many illnesses and ailments. Overall, it is penetrating, medicinal and stimulating. Psychologically, it invigorates mind, body and spirit; inspires confidence; Tea Tree also strengthens subtle energies.

107. Turmeric Root (Curcuma longa - Indonesia)

Turmeric has been known for thousands of years for its valuable health properties. The oil extracted from fresh rhizomes of this plant has a golden color and is high in sesquiterpene hydrocarbon alpha-curcumene, making it powerful anti-inflammatory. It's useful for treating arthritis and joint care, relieving muscle pain, preventing hair loss, particularly pattern baldness. Turmeric and its oil are now known to have anti-cancer properties and improve overall health. It's one of the best oils for skincare, promoting healthy and youthful skin.

108. Anise Star (Illicium verum - Thailand)

Anise Star is native to China, Vietnam, and Thailand. It has colorless to pale yellow oil with a warm, spicy-sweet aroma. Known for its beneficial effects on the digestive system, it provide relief from colic and flatulence. Additionally, it has been traditionally used as a stimulant for cardiac fatigue while also helping to ease palpitations. It is a general tonic for the circulatory system and respiratory tract, and has been known to alleviate asthma and breathing difficulties. With its stimulating and warming, it can also be useful for relieving colds.

109. Basil Sweet (Ocimum basilicum ct. methyl chavicol - Thailand)

Sweet Basil is a good tonic for the nerves especially when feeling fragile, sharpening the senses and encouraging concentration. Apparently calms nervous disorders, yet seems to have and uplifting effect on depression. Basil seems to have a beneficial action on the respiratory tract and is often used for sinus congestion, asthma and influenza. Also effective in digestive disorders, imitates the oestrogen hormone and often useful with menstrual problem such as scanty periods and engorgements of breasts. It gives rapid expulsion of afterbirth.

110. Basil Wild (Ocimum gratissimum - Vietnam)

It is also known as "African basil" or "clove basil." It is a perennial herb in the mint family, native to tropical Africa, and it is known for its strong, spicy and clove-like aroma. The leaves of the plant are steam-distilled to produce the essential oil, which is used in perfumery, aromatherapy, and traditional medicine. It is known to have many beneficial properties such as being antimicrobial, anti-inflammatory, and analgesic. It is also commonly used to relieve stress, headaches and to boost the immune system.

111. Bay West Indian (Pimenta racemosa - India)

Bay is an excellent essential oil for hair care. It stimulates the scalp, eliminates dandruff, and restores body and tone to oily, damaged, and lifeless hair. Its unique, masculine fragrance is great for massage oils and relieving body aches and pains. It is also effective in steam inhalations as an antiseptic for the respiratory system. Additionally, it has a stimulating effect on the mind and emotions. Psychologically, it has no specific indications but its masculine scent is often suitable for those who dislike sweeter smelling essential oils.

112. Cajeput (Melaleuca leucadendron var. cajuputi - Indonesia)

Cajeput is best known as an inhalation for colds and other respiratory infections, and effectively clears the nasal passages while inhibiting the bacteria that proliferate in the mucus formed during colds and flu. It also has pain-killing properties which help to reduce the discomfort of sore throats and headaches that accompany colds. The essential oil can irritate the skin, it need to be well diluted and should not be contacted with the mucous membranes. For situation that might be used on the skin, Tea Tree would be a safer choice.

113. Cedarwood Atlas (Cedarus atlantica - Morocco)

Cedarwood is fortifying, calming and opening. It is the first choice for men skin and hair-care products. It improves oily skin, acne and dandruff. It is also good for treating urinary-tract infections, coughs and chronic bronchitis. Psychologically, cedarwood reduces fear and helps you discover inner strength and courage. It is good for calming nervous tension and stress. Cedarwood is good in meditations and especially helps to instill confidence. It is a good general tonic for strengthening subtle energies. Cedarwood must be avoided to use during pregnancy.

114. Citronella (Cymbopogon winterianus - Thailand)

Citronella essential oil is obtained from a scented grass similar to lemongrass that grows and is cultivated in Sri Lanka, Thailand, and Indonesia. It is usually pale yellow to yellowish-brown with a powerful lemony scent. It can be used in a massage oil for rheumatism and is most widely used as an insect repellent as well as in the manufacture of soap and household disinfectants. This oil blends well with Lemongrass and Eucalyptus to make a softer scent for making insect repellent room sprays. Citronella winterianus has a very strong characteristic.

115. Clove Bud (Eugenia caryophyllus - Indonesia)

Clove bud is the first choice as first aid for toothache. A couple of drops of clove essential oil on a cotton wool bud, applied to the aching tooth, has a slight anesthetic affect, relieving pain for a few hours. If the pain is caused by a lost filling, a piece of cotton wool soaked in clove oil and inserted into the cavity will have the same analgesic, anesthetic effect. It strong antiseptic properties make clove good at preventing colds and influenza. Overall, clove is pain-relieving, comforting and revitalizing. Psychologically, clove is both restorative and stimulating.

116. Clove Leaf (Eugenia caryophyllus - Madagascar)

Clove leaf is the first choice as first aid for toothache. A couple of drops of clove essential oil on a cotton wool bud, applied to the aching tooth, has a slight anesthetic affect, relieving pain for a few hours. If the pain is caused by a lost filling, a piece of cotton wool soaked in clove oil and inserted into the cavity will have the same analgesic, anesthetic effect. It strong antiseptic properties make clove good at preventing colds and influenza. Overall, clove is pain-relieving, comforting and revitalizing. Clove Leaf is lighter oil comparing with Clove Bud.

117. Eucalyptus Spain (Eucalyptus globulus - Spain)

Eucalyptus boasts a variety of benefits. Its antiviral properties make it useful for skin eruptions such as herpes and burns, and it helps to prevent bacterial growth and aids in new tissue formation. Its cooling effect eases emotional turmoil, improves concentration and strengthens the nervous system. Additionally, it has a soothing effect on the respiratory tract, providing relief from inflammation and mucus, making it effective for influenza, throat infections, coughs, catarrhal conditions and sinusitis. The oil from Spain is considered to be of higher quality.

118. Eucalyptus Lemon (Eucalyptus citriodora - Madagascar)

Eucalyptus Lemon is an excellent choice for colds, sore throats and flu. Steam inhalations with lemon-scented eucalyptus help clear the sinuses and relieve headaches. A couple of drops of lemon-scented eucalyptus used in the bath, perhaps blended with lavender and rosemary, is refreshing and uplifting, good for athlete’s foot, herpes and dandruff, and makes an excellent insect repellent. It dispels fatigue and debility; it also clears the mind and can assist in making decisions, useful in meditations to keep the min clear and focused.

119. Fennel Sweet (Foeniculum vulgare - Spain)

Fennel sweet, a sought-after essential oil, is renowned for its detoxifying properties and often used in lymphatic massage. Its diuretic properties aid in eliminating toxins, making it a powerful urinary-tract antiseptic. It can also alleviate flatulence and digestive issues, balance menstrual cycles and ease hormone fluctuations during menopause. On a psychological level, fennel sweet is protective, warming and grounding. A few drops, when rubbed between the palms and brushed over the aura, can safeguard against psychic disturbance.

120. Kaffir Lime Peel (Citrus hystrix DC. - Thailand)

The soothing and sedative properties of this oil make it an excellent remedy for anxiety, depression, and nervous tension. Its refreshing and cool nature can help to soothe anger and frustration, likely by reducing the activity of the sympathetic nervous system. It's also beneficial for respiratory infections, including breathing difficulties. This oil is also a great addition to hair care products to reduce hair loss and heal the scalp. However, it's important to avoid prolonged exposure to sunlight after use as it increases the skin's sensitivity to the sun.